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help with recursive method

My problem is with this exercise:
Write a recursive method called power that takes a double x, and an integer n and that returns x^n. Hint: a recursive definition of this operation is x^n = x*x^(n-1). Also, remember that anything raised to the zeroeth power is 1. Optional challenge: you can make this method more efficient, when n is even, using x^n=(x^(n/2))^2.

Now call me crazy but I just can't see why recursion is necessary or how it could be implemented into this, here is the code I wrote:

It works, and returns x^n just as the exercise said, but it specified to use a recursive method so if any of you guys could give me a hand in how recursion would work with this problem it would be appreciated.